Electrical door operating mechanism



July 5, 1932. l J E KUNDE I 1,865,925

ELECTRICAL DOOR OPERATING MECHANISM Filed June 5, 1929 INVENTOR Patented July 5, 1932 PATENT @EF'FECE JOHN E. KUNDE, OF LOS ANGELES, CALIFORNIA ELECTRICAL DOOR OPERATING MECHANISM Application filed. June 5, 1929. Serial No. 368,560.

My invention relates to improvements in electrical door operating mechanism and one of the objects of my invention is to provide a mechanism of light construction embodyidng a simplified linkage for operating the oor.

The above and further objects and advantages of my invention, as will hereinafter more fully appear, I attain by the construction described in the specification, and illustrated in its preferred form in the drawing forming a part of my application.

While the drawing illustrates an embodiment of the invention it is to be understood that in adapting the same to meet diflerent conditions and requirements, various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit of the invention, as defined by the appended claims.

The invention will be readily understood by reference to the drawing, wherein Fig. 1 is a plan view partly in section showing the linkage connections of the T-rails to the doors;

Fig. 2 is a plan of the power mechanism for driving the T-rails.

Fig. 3 is a front elevation of the mechanism shown in Fig. 2;

Fig. 4 is a vertical section of the power mechanism taken on the line 4-4 of Fig. 3, looking in the direction of the arrows;

Fig. 5 shows schematically the motor control circuit.

Similar numerals refer to Similar parts throughout the several views.

Attached to door 1 is a horizontal. bar 3 on which is slidably mounted a sleeve 4. An arm 6, secured'intermediately of its ends to the door lintel by a pivot pin 7, is pivoted at its outer end to sleeve 4 and at its inner end to a link 8, which is pivotally connected to one end of a perforated Trail 9.

Similarly, door 1a is connected to one end of a perforated Trail 10 by means of a bar 8, a pivoted arm 6, and a link 8.-

Brackets 11, secured to the building structure 2 by screws 12, carry plates 13 for guiding and supporting the T-rails 9 and 10.

The T-rail 10 is mounted to slide in guides placed below the guides for the T-rail 9.

Mounted on a bracket 14 bolted to the building structure 2 above the doors is an electric motor 15, on the shaft of which is 55, secured a worm 16 for rotation therewith. The worm 16 drives a worm gear 17 rotatably' mounted on a shaft 18 journalled in a U- shaped bracket 19 forming an integral part of motor bracket 14.

Fixed to one face of the worm gear 17 is one member 20 of a friction clutch. The other member 21 of the friction clutch is splined upon the shaft 18 for rotation therewith and for sliding movement along the 5 shaft. The clutch member 21 is yieldably held in engagement with the member 20 by a spring 22 surrounding the shaft 18 and bearing at one end against the fixed bracket 19 and at the other end against the member 21. 1

An emergency clutch release lever 23 is pivotally mounted at 24 upon the bracket 19 and is provided with fingers 25 which engage in a groove in the clutch member 21.

An operating cable 26, secured to the up- 7 per end of the lever 23, extends to a locked compartment (not shown) placed exteriorly of the building.

The shaft 18 is provided on its outer end with a sprocket gear 27, secured thereto, which engages the perforated T-rails 910; the perforated flanges of the T-rails 9 and 10 being above and below the shaft 18 and at equal distances from the axis of rotation of said shaft.

The means for controlling the electric motor comprises a four-way reversing switch 28, a three-way stop switch 29, and a threeway remote control starting switch 30.

The switches 28 and 29 are conventional 90 toggle switches and are enclosed in a box 31 mounted upon the building structure above and closely adjacent one end of the T-rail 9.

A rod 32, connected to the switch arm of both switches, is slidably mounted in the box 5 31 and projects outwardly therefrom.

One outwardly projecting end of red 32 is bent downwardly to lie in the path of movement of two operating strikes 33.

The strikes 33 are loosely and slidably mo mounted in U-shaped bracket members 34:

secured to opposite ends of the T-rail 9.

Between the headed inner end of each strike and one leg of the bracket aspring 35 is interposed in order to cushion the operation of the rod 32 by the strike 33.

The circuit connection of the switches 28, 29 and 30, the main field coil M and reversing coil R- of the motor is obvious from the showing of Fig. 5.

it-h the switches in the the motor is at rest.

)Vhen the starting switch 30 is moved to the dotted line position the motor circuit will be completed from one power line 36 through switch 30, line 37 switch 29, line 39, coil M of the motor, to the other power line 36. A circuit is also completed from line 39 through one arm of switch 28, coil full line positions R and other arm of switch 23 to line 36.

When the switches 28 and 29 are moved to the dotted line positions (by one of the strikes the circuit just described will be broken.

)Vhen the starting switch 30 is subsequently moved back to the full line position a circuit will be completed from one power line 36, switch 30, wire 38, switch 29, wire 39, coil M, to the other power line 36.

At the same time a reverse circuit through coil R will be completed from wire 39 through one arm of switch 23, coil Pt, and the other arm of switch 28 to the power line 36.

The operation of my door-operating mechanism to open the doors is as follows The operator presses the remote switch 30 to start the motor, as described. Rotation of the motor rotates sprocket 27, through worm 16, gear 17, and clutch 2021, and slides the T-rail 9 to the right, and the T-rail 10 to the left, in Figs. 1 and 3.

The movement of the T-rails pulls the links 8 toward each other and rot-ates arm 6 around pivot 7 to open the doors; the sleeves l sliding along the bar 3.

As the doors approach open position the strike 33, on the left end of the T-rail 9 (Fig. 3) engages and operates the rod 32 and moves the switches 28 and 29, to the dotted line position (Fig. 5), and de-energizes the motor.

The operation to close the doors is the reverse of that previously described; the strike 33 on the right end of the T-rail 9 (Fig. 3) moving the switches 28 and 29, back to the full line positions (Fig. 5), to de-energize the motor.

The friction clutch serves as a safety device preventing injury to any person or vehicle which might be caught between the moving doors and serves to relieve the motor of any overload which might be placed upon it by such obstruct-ion.

The clutch is provided with a manually operable emergency release to permit the doors to be opened or closed by hand in case the power fails.

Having described the invention, what I claim as new and desire to have protected by Letters Patent, is

1. An operator for a swinging door comprising a bar secured to said door, a sleeve slidable thereon, an arm pivoted to the door frame and connected to said sleeve, brackets mounted upon the frame, a perforated rail slidable in said brackets, a link connecting the arm and one end of the rail, a reversible electric motor secured to the frame above the rail, a worm on the shaft of the motor, a worm gear driven by said worm and having one member of a clutch secured thereto, a shaft upon which said gear is rotatable, a spring controlled co-operating clutch member splined on the shaft, a hand lever forreleasing the clutch, a sprocket on the shaft for driving the perforated rail, reversing switches for the motor, a slidable rod for controlling said switches, and means carried by the rail for contacting the rod, and a hand switch for supplying current to the motor.

2. An operator for aswinging door com prising a perforated T-rail, brackets in which said T-rail slides, connections between the door and the end of said T-rail, a reversible electric motor mounted above the T-rail, a worm driven by said motor, a worm gear in engagement therewith having one member of a clutch secured thereto, a shaft upon which said gear is rotatable, a spring controlled co-operating clutch member splined upon said shaft, provided with a groove, a hand operated lever having fingers engaging said groove, for releasing said clutch, a

sprocket on said shaft for driving the perforated T-rail, means on the T-rail for controlling the motor for opening and closing the doors, and manual means for supplying current to the motor.

3. An operator for outwardly swinging doors comprising a bar secured to each door, a sleeve slidable on each bar, arms pivoted to the door frame each connected to one of said sleeves, brackets mounted upon the inside frame of the door, spaced perforated T-rails slidable in said brackets, a link connecting each arm to the end of each of the T-rails, a reversible electric motor mounted upon the frame above the T-rails, a sprocket placed between the T-rails for driving them in opposite directions, driving connections between the motor and the sprocket, means carried by the T-rail for automatically controlling the motor to open and close the doors, and manual means for supplying current to said motor.

In witness whereof I hereunto subscribe my name this 3d day of June, 1931.

JOHN E. KUNDE. 

